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@erorus erorus/split.php
Created Apr 18, 2018

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Split blocks of video transcript into paragraphs
<?php
/* quick and dirty paragraph splitter
* by Erorus
*
* this script is fully in the public domain, do what you want with it
*
* intended for use for unformatted video transcripts
* such as ones produced by Ars Technica, e.g.
* https://cdn.arstechnica.net/wp-content/uploads/2018/04/3545034e-f60c-4657-b223-6cde51b5576fcc.txt
*/
define('PARA_LENGTH', 600);
$lines = file(__DIR__ . '/textblocks.txt', FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
$paragraphs = [];
foreach ($lines as $line) {
$paragraphs = array_merge($paragraphs, BuildPara($line));
}
echo implode("\n\n", $paragraphs), "\n";
function BuildPara($line) {
$split = preg_split('/([\.\?!][^\w\s]*)(?: |$)/', $line, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
$ret = [];
$para = '';
while (count($split)) {
$words = array_shift($split);
$punct = array_shift($split);
$text = $words . $punct;
if (substr($punct, 0, 1) == '?') {
// sentence is a question, force into own paragraph
if ($para) {
// close prev paragraph
$ret[] = $para;
$para = '';
}
$ret[] = $text; // new paragraph is just the question
continue;
}
if ($para) {
$commaPos = strpos($text, ',');
if (strlen($para) + strlen($text) > PARA_LENGTH // hit length limit on paragraph
|| ($commaPos !== false && $commaPos < 10)) { // sentence starts with introductory word, probable new thought/paragraph
$ret[] = $para;
$para = '';
}
}
$para .= ($para ? ' ' : '') . $text;
}
$ret[] = $para;
return $ret;
}
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